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  6. Step 1 Brainstorming a Question
  7. Step 2 Variables and Hypotheses
  8. Step 3 Design Your Experiment
  9. Step 4 Plan your experiment
  10. Step 5 Do your experiment
  11. Step 6 Background
  12. Step 7 Analyze Your Data
  13. Step 8 What does it mean?
  14. Step 9 Prepare for Presentation
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delm-tem4

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Broad Question

Which soda brand has the most carbonation?

Specific Question

Which soda brand explodes the most when shaken?

Variables

Independent Variable: Type of Soda
Dependent Variable: Amount Spewed
Variables That Need To Be Controlled: Amount of Soda

Hypothesis

I hypothesize that Seltzer will have the most carbonation.

Graph of Hypothesis

Delia's_Hypothesis_Graph.jpg

Experimental Design

I will conduct my experiment at my house. I don’t actually need anyone for my experiment, but will most likely have one or two people to help out. I will probably do about three trials to collect enough information for a reliable conclusion. To conduct my experiment, I will measure how much soda is left in the bottom of the can after shaking it. I will take pictures and record my data on a spreadsheet. When I’m done, I will transfer the information onto the computer.

Materials List

1. Cans of Soda
2. Liquid Measuring Cup
3. Pencil

Detailed Procedure

1. Collect all materials.
2. Shake up one can.
3. Quickly place shaken can on table.
4. Open can and let it spew.
5. Transfer the left over soda into a liquid measuring cup.
6. Record amount of liquid onto data table.
7. Repeat steps 2-6 for each can.
8. Transfer data onto computer.

Background Research

Carbonation is the process of dissolving carbon dioxide in water when the carbon dioxide is under high pressure. When you shake a bottle of soda, bubbles appear. These bubbles are made up of carbon dioxide when pressure is released. For soda, carbonation is created by adding dissolved carbon dioxide and carbonic acid into the liquid. At the bottling plant, carbon dioxide molecules are forced into the soda in an amount that is greater than would ordinarily dissolve under atmospheric conditions. As soon as you open the bottle, most of the excess gas escapes into the room. In an unopened bottle, there is equilibrium between the carbon that has been dissolved into the liquid and the carbon gas floating at the very top of the bottle. Opening the bottle results in a bit of fizzing as the pressure that has been keeping the carbon dissolved is released, but nothing that will spray you in the face with soda.

References

"Carbonation - Wikipedia, the free encyclopedia." Wikipedia, the free encyclopedia. Web. 6 Feb. 2012. http://en.wikipedia.org/wiki/Carbonation.
Why Does Shaken Soda Explode?" Answers.yourdictionary.com - Answers to Questions. Web. 09 Feb. 2012. <http://answers.yourdictionary.com/science/why-does-shaken-soda-explode.html>.
"How to Shake a Can of Soda and Keep It from Exploding." Science Projects Experiments, Educational Toys & Science Toys. Web. 10 Feb. 2012. <http://www.stevespanglerscience.com/experiment/soda-can-shake-up-experiment>.
"Food Science: Why Carbonated Soda Explodes When Shaken | The Kitchen." The Kitchen | Inspiring Cooks, Nourishing Homes. Web. 10 Feb. 2012. <http://www.thekitchn.com/food-science-why-carbonated-so-89864>.